Roofing element



March 1, 1927. 1,619,598

H. A. yCUMFER ROOFIG ELEMENT Filed Oct. 2, 1924 n n. ms

y?? of lPatented Mar. 1 i

UNITED STATES l1,619,59'8 PAT-ENT OFFICE.

HARRY A. CMFER, `F CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO THE FLINT- KOTE COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHU- SETTS.

RooFING ELEMENT.

Application med october 2, 1924. serial No.' 741,115.

This invention relates to improvements in roofing elements and product thereof, and refers more particularly to theproduction of roofing strips or slabs having inclsions adjacent one longitudinal edge, the incised.

,portions being folded back upon the body portion of the slab or strip to present a longitudinal'edge having a plurality of notches taking more or less of a frusto-triangular form. AThe process of slitting consists essentially in feeding a strip of previously prepared roofing-felt saturated with a waterproofing compound and having a granular f diagonal lines, terminating short of an actual meeting. These diagonal lines are preferably formed on one side only of the transverse line of severance as the sheet is fed forward, in order that the portions between the slits may be folded back upon the main body of the strip as part of a cont-inuous operation. There may be any number of slits but I show eight slits to form four tabs and corresponding notches.

y showing the transverse Some of the advantages of my invention are the utilization of the entire strip and the prevention of any waste in cutting to produce self-spacing shingle strips and the ornamental effect produced when laid on a roof.

In the drawings:

Fig. 1 is a plan view of a roofing sheet and diagonal lines of severance.

Fig. 2 is a plan view of an individual strip.

Fig. 3 is a planof Ia' roof laid with the individual slabs in position', the base of succeeding strips abutting the upperedge of the turned back tab.

Fig. 4 is an enlarged perspective view of the edge of an individual slab showing the notch and corresponding tab imposed on the body of the strip.

Fig. 5 is a view similar to Fig. 3 with the base of succeeding strips supported in a pocket formed by the turned back tabs.

Fig. 6 is a cross sectional view taken on lines 6-6 of Fig. 5.

Referring in detail to the drawing, 1 designates a strip of roofing felt which has been previously impregnated with a waterproofing material such as asphalt, one or both surfaces of which may have imposed thereon a granular surfacing. This strip may be any length, for instance, may be fed from a roll and is transversely severed as f shown at 2, the sheet being fed forward in the direction shown by the arrow.

Communicating with the transverse severing line 2, the strip is sltted to provide a plurality of sets of converging diagonal incisions 3, the extremities of which terminate short of an actual meeting to provide uncut portions 4, for a purpose hereinafter explained.

The roong sheet 1 is fed through any suitable form of machine which will sever the sheet as shown in Fig. 1,- and equipped with means for folding back the tabs 5 upon the surface of the body of the `individual slab or strip, the uncut portion 4 being the connecting means. The tab 5 may have its entire area attached to the body of the strip by any suitable adhesive as shown in Figs, 3 and 4, or a port-ion of the tab 5 may e attached, leaving the upper end unattached to form a pocket 6 as shown in Figs. 5 and 6.

In the form shown in Figs. 3 and 4, the upper edge 7 of the tab 5 forms a butt against which the base 8 of the overlying shingle is adapted to be placed. It will thus be seen that by my invention, all of the original roofing material is utilized without any waste and at the same time producing individual self-spacing shingles.

In the form shown in Figs. 5 and 6, the upper edge 7 of the tabs 5 are unattached to the body of the roofing sheet to form pockets 6 in which the base 8 of the overlying shingles is adapted to be inserted and locked fixedly in position.

The result, Vwhen laid upon a roof, is an attractive design, in which the tabs 5 prefer-` ably display a color different from the color of the granular surfacing on the upper surl face of the main body portion. These tabs 5 .when folded back finay present a black sur# I claim as my'invention: y and'having alongne longitudinal edge a 1. A self-spacing roofing strip provided plurality of sets of diagonal incisions, the adjacent one longitudinal edge with sets of individual incisions of each set converging opposed converging, tapering incisions, terbut terminating short of meeting, the por-'ll 5 minating short of meeting to form intertions between each oset of incisions being y mediate tabs between the opposed incisions, folded backupon and attached to the body Ysaid tabs being folded uponiand attached.` to portion of the strip to form self-spacing the body portion of the strip. butts for overlying s ingles, and semi-hexag- 2. A self-spacing 'shingle strip 'adapted onal notches extending inwardly from one 0 1 for use with others, comprising a wateredge.

proofed :felt having a granular surfacing HARRY A. CUMFER. 

